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CVE-2026-52684

LOW
3.7
CVSS 3.1
Description
If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost expired records are used to refresh the authoritative NS records.

Metadata

CVE ID
CVE-2026-52684
State
PUBLISHED
Assigner
OX
Reserved
2026-06-08 08:05 UTC
Published
2026-07-23 07:49 UTC
Last updated
2026-07-23 14:00 UTC
Vendor / Product
PowerDNS / Recursor
Sources
cve.org  ·  NVD

Severity & Metrics

3.7 LOW CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
PowerDNS Recursor — 0.0.0 < 5.5.0
Weakness (CWE)
CWESourceDescription
— cna Time-of-check Time-of-use (TOCTOU) Race Condition
CVSS scores (1)
ScoreSeverityVersionSourceVector
3.7 LOW 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References (1)
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